83051221421865 has 32 divisors (see below), whose sum is σ = 135723084834816. Its totient is φ = 43347133668800.

The previous prime is 83051221421827. The next prime is 83051221421869. The reversal of 83051221421865 is 56812412215038.

It is not a de Polignac number, because 83051221421865 - 2⁷ = 83051221421737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83051221421869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902590 + ... + 12919640.

It is an arithmetic number, because the mean of its divisors is an integer number (4241346401088).

Almost surely, 2^{83051221421865} is an apocalyptic number.

It is an amenable number.

83051221421865 is a deficient number, since it is larger than the sum of its proper divisors (52671863412951).

83051221421865 is a wasteful number, since it uses less digits than its factorization.

83051221421865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12026909.

The product of its (nonzero) digits is 921600, while the sum is 48.

The spelling of 83051221421865 in words is "eighty-three trillion, fifty-one billion, two hundred twenty-one million, four hundred twenty-one thousand, eight hundred sixty-five".